/*
  配置cors，允许跨域
*/

module.exports = function(){
    return (req,res,next)=>{
        // 允许跨域的域名，*代表允许任意域名跨域
        res.header("Access-Control-Allow-Origin","*");
        // 允许携带cookie
        res.header('Access-Control-Allow-Credentials', 'true');
        // 允许的header类型
        res.header("Access-Control-Allow-Headers","content-type,request-origin");
        // 允许的请求方式 
        res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS");
        
        next();
    }    
}